This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence
This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence
This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence
This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence
Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Telephone crossbar switch, made by Swedish Ericsson, Stockholm, Sweden, 1921.
Crossbar switching dates back to the earliest days of manual telephone switchboards, which used sets of overlapping brass bars with holes at the intersections for brass plugs to connect telephone calls. This switch had ten horizontal and ten vertical bars, so could support up to 100 subscribers. Crossbar switches needed less maintenance than step-by-step switches exchanges, and operated more simply.
On display
Science Museum: Information Age Gallery: Exchange
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Details
- Category:
- Telecommunications
- Object Number:
- 1970-454
- type:
- electric switch
- taxonomy:
-
- component - object
- credit:
- Donated by L. M. Ericsson
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Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
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